Railway signaling system.



W. J. COOK & S. DEUTSOH.

RAILWAY SIGNALING SYSTEM. APPLICATION FILED AUG. 2'9, 1911.

1,084,6 1 Patented Jan. 20, 1914.

3 SHEETS-SHEET 1.

I [724)672ZOP8: %inesses:- V/z'ZZz'am J. 000k W. J. COOK & S1 DEUTSGH.RAILWAY SIGNALING SYSTEM. 111111011 1011 FILED AUG. 29, 1911.

1 ,084,61 0. Patented Jan. 20, 1914.

3 SHEETS-SHEET 2.

CDLUMBIA PLANOGRAPH COqWASHINGTON. D. c,

W. J. COOK (S1: S. DBUTSGH. RAILWAY SIGNALING EYSTBM.

APPLICATION FILED AUG. 29, 1911.

Patented Jan. 20, 1914.

3 SHEETS-SHEET 3.

- W ZWaQ/M COLUMBIA PLANOGRAPH CD-JVASHINOTON, D. C.

UNITED STATES PATENT OFFICE.

ILLINOIS, ASSIG'NORS TO THE COOK RAILWAY SIGNAL COMPANY, OF IDEN'VER,COLORADO, A CORPORATION OF COLORADO.

RAILWAY SIGNALING SYSTEM.

Specification of Letters Patent.

Patented Jan. 20, 1914..

To all whom it may concern Be it known that we, WILLIAM J Coon and SIMONDEU'ISOH, citizens of the United States, residing at Denver, Colorado,and Chicago, Illinois, respectively, have invented certain new anduseful Improvements in Railway Signaling Systems and we do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the characters of reference marked thereon, which form a part ofthis specification.

Our invention relates to improvements in electric block signalingsystems.

Our object is to provide a simple, convenient and eflicient constructionfor displaying proper signal indications whenever a train enters orleaves a block signaled section of the track. This construction includesmeans whereby a circuit is normally closed through an electromagnet andintermittently closed through an electric motor, whereby the semaphorearm is moved to the safe position as soon as a train leaves the block,mechanism being provided whereby the motor circuit is broken as soon asthe signal arm is raised to the said position, while the circuit remainsnormally closed through the electromagnet, whereby the signal mechanismis locked in the safe position. As soon, however, as a train enters ablock, a circuit, which is normally closed through a relay formaintaining the electromagnet in the energized condition, is shortcircuited, whereby the relay is deenergized and the circuit brokenthrough the electromagnet, allowing the armature to fall whereby themechanism which supports the signal arm in the safe position is unlockedand the said arm, which is counterbalanced to fall, allowed to assumethe danger position. Provision is also made for automatically retardingthe fall of the said arm to prevent its sudden downward movement andconsequent jar of mechanism.

7 At the same time that the signal arm assumes the danger position, acircuit is closed through a red or dangerlamp, thus displaying two formsof signal, one being the semaphore arm and the other the red or dangerlight. v

Having briefly outlined our improved construction, we will proceed todescribe the same in detail, reference being made to the accompanyingdrawing, in which is illustrated an embodiment thereof.

In this drawing: Figure 1 is a view,

7 chiefly in elevation, of our improved signalmg apparatus shown on asmall scale.

2 1s a view of the upper part of the apparatus, illustrating thesemaphore arm in its two positions of danger and safety, the signallamps being also illustrated, the parts being shown on a larger scalethan in Fig. 1. Fig. 3 is a detail view in elevation of the mechanismshown in Fig. 2, viewed in the direction of the arrow in the last-namedfigure. Fig. 4 is a view in elevation of the operating parts of ourimproved construction, being a view looking in the direction of thearrow in Fig. 5. Fig. 5 is a view taken at right angles to Fig. 4, theparts being shown in elevation. Fig. 6 is a view similar to Fig. 5, andillustrating the same mechanism, but showing parts in different relativepositions. Also in this view, the electrical circuit is illustrated, asection also of the blocked track being shown.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a post or upright structure carrying theentire operating parts of our improved apparatus. The structure 5 may besaid to consist of four sections, viz., the lower or base section 6; asection 7 immediately above the section 6 and carrying the operatingmechanism illustrated in Figs. 1 to 6, inclusive; a tubular section 8immediately above the section 7; and a top section 9 above the section 8and suitably connected therewith. As illustrated in the drawing, thesection 7 consists of a casing whose lower extremity is provided with asocket 10, adapted to receive the upper extremity of the base section 6,the latter being fashioned to fit snugly therein. The upper extremity ofthe casing 7 is also provided with a similar socket 12 into which .thelower end of the hollow post section 8 whereby it may be easily packedin small compass for transportation, either by railway or otherwise.This particular arrangement, however, is not, by any means, essential tothe invention, but is explained for the purpose of indicating in ageneral way that the mechanism is well adapted for facilitating itstransportation fro-m place to place.

Referring now to the essential features of the invention, let thenumeral 16 designate a section or block of the railway track, the saidsection being insulated, as shown at 17, from other sections or blocks.The rail members 18 and 19 of the block 16 are respectively connectedwith the poles 20 and 21 of an electrical source 22, (which, asillustrated in the drawing, is an alternating current generator), bymeans of conductors 23 and 24. This generator supplies current to arelay 25, suitably arranged along the track, one terminal of the coil 27of which. is connected with the rail member 19 of the block by aconductor 26, while the other terminal of the coil is connected with therail member 18 by a conductor 28. The core 29, or movable member of therelay, is provided at its outer or lower extremity, (since it is assumedthat it will be vertically arranged), with a bar 30, forming a T-shapedstructure, the said bar being normally held in engagement with twocontacts 31 and 32, which are bridged by the bar when the relay isenergized, or when the circuit is closed through its coil 27.

When the bar 30 of the relay core is raised to the dotted line positionin Fig. 6 and the contacts 31 and 32 bridged, as aforesaid, the circuitis closed through a generator 33 in the following manner: From thecontact 32 a wire 34 leads to one pole 35 of the generator, while a wire36 leads from the other pole 35-} of the generator to a green or safelight G, carried by the top member 9 of the structure 5. From this lightG, a wire 37 leads to a conductor 38, which it joins at a point 39, fromwhich point the circuit is completed through the wire 38 through thecontact 31, the bar 30, the contact 32, and a conductor 39, which isconnected with the pole 35 of the generator 33. Hence, when the bar 30is in the normal or dotted line position in Fig. 6, the circuit isclosed through the green or safe light. It is also closed temporarilythrough a motor 40 and continuously through an electromagnet 41, whilethe bar is in the same position, the electrical connections being asfollows: From a point 42 on the wire 36 a conductor 43 leads to themotor 40, being connected therewith at a point 44, while, from a point45, a conductor 46 leads to a contact 47 which is normally engaged atone extremity by a pivoted bar 48, constituting an electrical conductor,from which bar a wire 49 leads to a terminal 50of the electromagnet 41,from which point the 'motor circuit is completed through the conductor38, the contact 31, the bar 30 of the relay core, the contact 32, andthe wire 39 to one pole of the generator 33. The circuit is completedthrough the coils of the magnet 41 as follows, assuming that the bar 30is in the dotted line position: From a point 51 on the wire 36 aconductor 52 leads to a terminal 53 of the said magnet, while from theopposite terminal 50 of the mag- -net-, the circuit is completed in thesame mannervas from the same point through the motor, viz., by way ofthe conductor 38, the contact 31, the bar 30, the contact 32, and thewire 34, to the pole 35 of the generator 33.

Referring to Fig. 6 of the drawing, let the numeral 54 designate a trainlocated in the block 16. For convenience of illustration,

this train is conventionally illustrated by means of metal wheels 55 anda metal axle 56, whereby the track rail members 18 and 19 are bridgedand the current from the lgenerator 22 short circuited, thus breakingthe circuit through the coil of the relay 25, whereby its core isallowed to drop, its bar 30 engaging two contacts 57 and 58, the saidcontacts being bridged by the metallic bar. In this event, it will beevidentthat the circuit is broken through the electromagnet 41 andthrough the motor 40, whereby an armature bar 59 is allowed to drop andthe signal arm allowed to fall to the danger position, by virtue ofmechanism hereinafter more fully explained in detail. At the same timethat the semaphore arm falls to the danger position, the circuit isbroken through the green or safe light and closed through the red ordanger light, the latter condition being effected in the followingmanner: the current from the generator 33 may be said to pass from thepole 35.; through the wire 36 to a point 60 thereon, from which point awire 61 leads to the red lamp It, from which lamp a wire 62, (see Figs.2 and 6), leads to the contact 57, from which the circuit is completedthrough the bar 30, the contact 58, a short conductor 63, and theconductor 34 to the opposite pole 35 of the generator. In order tocontrol the rise and fall of the semaphore arm, or its movement to thesafe and danger posit-ions, respectively, certain mechanism isessential, and this will now be described. A shaft 64 is journaled inthe casing 7 and upon it is mounted and made fast a grooved pulley 65with which one extremity of a flexible device, 66, (in this instance,illustrated as a chain), is secured as shown at 67, while its oppositeextremity is connected with a quadrant 68, connected with the semaphorearm 69 on the opposite side of a pivot 70 of said arm. From this, itwill be understood that, as the said pulley is turned in one direction,the semaphore arm will be it is allowed to pass below a shaft 76 uponwhich a gear 77 and a worm wheel 78 are mounted and made fast. The leverarm 73 is connected by means of a link 79 with one extremity 80 of thearmature bars .59 of the electromagnet 41. This connection between thelink and the lever arm 73 is made through the medium of a pin 81,passing through a slot 82 formed in one end of the link. By virtue ofthis connection and arrangement, when the armature bar is raised throughthe influence of the energized magnet 41 upon the soft iron member 83,the pinion 72 is thrown into mesh with the large gear 71, whereby anoperative connection is formed between the motor 40 and the said' gearthrough the instrumentality of a worm 84, engaging the worm wheel 78 andthe gear 77, which meshes with the pinion 72. The worm 84 is carried bya shaft member 85 journaled in the casing or frame structure 7 andcoupled, as shown at 86, with the armature shaft 87 of the motor.

In order to positively sustain the armature bar 59 and its connectionsin the raised position, whereby an operative connection is establishedbetween the motor and the gear 71 for rotating the latter and raisingthe semaphore arm to the safe position, aspringactuated pawl 88 ispivotally connected, as shown at 89, with one extremity of the lever arm73, the said pawl being acted on by a spring 90, whereby it is adaptedto be thrown into engagement with one extremity 91 of a bar 92, pivotedat 93. The extremity of the bar 92, opposite the extremity 91, isequipped with a bolt 3, adapted to be engaged by a projection 94 formedon an arm 95 fast on a rock shaft 96, to which one extremity of thearmature bar 59 is also made fast. When the armature bar is raised,through the influence of the energized net 41, the hooked extremity ofthe pawl 88 is brought into interlocking engagement with the extremity91 of the bar 92 and simultaneously the projection 94 of the arm 95 isbrought into engagement with the head of the bolt 3, occupying theposition above the latter, whereby the bar 92 is locked in thehorizontal position and made to sustain the lever arm 73 in the positionto maintain the pinion 72 in mesh with the large gear 71. It Will beunderstood that this looking mechanism is essential, since the influenceof the magnet 41 would not be suflicient to maintain the pinion 72 inoperative'engagement with the gear 71, during the operation of thelatter for the purpose of raising the semaphore arm to the safeposition. While the semaphore arm is moved to the safe position throughthe power of the motor 40, as soon as the magnet 41 is deenergized andthe armature bar released, the weight of the semaphore arm 69, which iscounterbalanced to fall, will be suflicient to reverse the operatingmechanism composed of the pulley 65, the gear 71 and the shaft 64; and,in order to prevent the arm from falling suddenly, whereby the mechanismmight be subjected to injury by the resultant concussion or jar, we haveprovided retarding means consisting of a ratchet wheel 97, composed oftwo members 98 and 99, which are connected by clamping bolts 100,whereby the ratchet is clamped to a collar 101, with which the shaft 64is provided, the clamping condition being sufiicient to produce thenecessary friction between the ratchet wheel and the collar of the shaftto retard the rotation of the shaft incident to the falling movement ofthe semaphore arm, the said ratchet wheel being locked against rotationin the direction of the shafts rotary movement at such time by a pawl102, pivoted on the stationary framework of the casing 7, as shown at103.

In order that the electromagnet 41 may be relieved of the resistanceoffered by the weight of the load incident to the raising of thesemaphore arm to the safe position, when moving the pinion 72 into meshwith the gear 71, the last-named gear is provided with a pin 104, whichenters a curved slot 105 formed in the pulley 65, the arrangement beingsuch that this pin, when the semaphore arm is in the lower or dangerposition, is in one extremity of the said slot and is allowed to travelto the other extremity of the slot before the operating mechanism willtake up the said load, and during this interim, between the starting ofthe motor and the taking up of the load, the pinion 72 is brought intomeshing relation with the gear 71 and the parts are secured in thelocked position by the auxiliary looking means. It will be understoodthat, as the pulley 65 is fast on the shaft and the gear 71 loosethereon, the operating mechanism will not take up or act upon the loaduntil the gear wheel 71 is turned sufliciently to bring the pin 102 tothe opposite extremity of the slot 105 of the pulley. The gear wheel 71is provided with two lugs or projections 106 and 107, which are arrangedon the said wheel about ninety (90) degrees apart. The mechanism is soconstructed and arranged, as illustrated in the drawing, that the gearwheel 71 moves approximately three-fourths of a revolution during theraising and falling operations of the semaphore arm, the said movements,of course, being in reverse directions during the two opera tions of thesemaphore. When the motor is operated to raise the semaphore arm and thegear 71 has been turned approximately three-fourths of a revolution, thelug 107 will engage one extremity of the pivoted arm 48 and actuate thelatter to disengage the opposite extremity of the said arm from thecont-act 47, thus breaking the motor circuit and stopping the motor;while, during the opposite movement of the gear wheel 71, incident tothe falling of the semaphore arm, to the danger position, the lug 106 isbrought into engagement with the same extremity of the pivoted arm butmoving in the opposite direction, whereby the position of the said armis reversed and the motor circuit closed at this particular location. Atthis time, however, the motor circuit is broken at another point, viz.,by the falling of the bar 30, incident to the breaking of the circuitthrough the coil 27 of the relay 25.

From the foregoing description, the operation of our improved apparatuswill be readily understood. Assuming that the operating parts are in thenormal position, incident to the energizing of the magnet 41, due to theclosing of the circuit through the coil 27 of the relay 25, the armaturebar will be raised to the position illustrated in Fig. 5, whereby thepinion 72 will be brought into mesh with the gear 71 due to the liftingof the arm 73 and its connections, as heretofore explained. Now, if weassume that a train 54 enters a block 16, the current supplied by thegenerator 22 will be short circuited through the wheels and axle of thesaid train, whereby the circuit will be broken through the coil 27 ofthe relay 25 and its core allowed to fall, whereby the bar 30 is broughtinto engagement with the contacts 57 and 58 bridging the space betweenthem. In this event, the circuitwill be broken through the safe or greenlight G, and closed through the red or danger light R in the followingmanner: Starting at the pole 35-}- of the generator 33, the current maybe said to pass through the conductor 36 to a point 60, thence through aconductor 61 to the red light, thence through a conductor 62 to thecontact 57, thence through the bar 30 to the contact 58, thence throughthe short conductor 63 to the conductor 3% to the opposite pole 35 tothe generator 33, completing the circuit. At the same time, the circuitis broken through the magnet 41, allowing the armature bar 59 and itsconnections to fall to the position illustrated in Fig. 6, whereby thepinion 72 is disengaged from the gear 71, thus virtually unlocking thesaid gear and allowing the semaphore arm to fall. During this fallingoperation,the pulley 63 is rotated in the direction indicated by thearrow B, the gear 71 being also actuated by virtue of the fact that itspin 102 engages the extremity of the slot 105 of the pulley, asindicated in Fig. 6, and it is by virtue of this construction andarrangement that the locking of the gear 71, by virtue of its meshingrelation with the pinion 72, also serves to lock the pulley 65 againstrotation in the direction of the arrow B, or in the direction to allowthe semaphore arm to fall when the latter is in the raised or safeposition. In order that the pin 10% may normally remain in the properextremity of the slot 105, in order that the mechanism may operate, asheretofore described, the gear wheel 71 is provided with an integralweight or enlargement 108, so arranged that, as soon as the semaphorearm falls to the danger position, whereby the pin 10% would, at the endof such falling movement, be in the extremity 109 of the slot 105, (seeFig. 5) ,the gear 71 will automatically move in the direction of thearrow B,- (see Fig. 5),sufficiently to cause the pin 10% to engage theopposite extremity 110 of the said slot. By virtue of this arrangement,it will be understood that, when the motor circuit is closed, in orderto raise the semaphore arm to the safe position, in which event the gear71 must be rotated in a direction opposite that indicated by the arrowB, the gear will be allowed to move a distance equal to the length ofthe slot 105 before it will take up the load incident to the raising ofthe said arm. .After the semaphore arm has fallen to the dangerposition, and the red or danger light has been dis played, incident tothe entrance of a train 5 1 to a block 16, it will be understood that,as soon as the train leaves this block, the circuit will be closedthrough the coil of the relay 25, and the bar 30 of the core raised tothe dotted line position in Fig. 6, whereby the circuit is closedthrough the motor and the magnet 41, with the result that the armaturebar 59 will be raised to the position shown in Fig. 5, and the pinion 72brought into mesh with the gear 71, whereby the said gear is rotated ina direction opposite that indicated by the arrow A in Fig. 6, with theresult that the pulley 65 is also rotated in the same direction, its

movement, however, not commencing until the gear 71 has traveled adistance equal to the length of the slot 105. lVhen the gear 71 hasmoved a suflicient distance to raise the semaphore arm, the pin 107 willengage the pivoted arm 18 and break the motor circuit, as heretoforeexplained. -This stops the operation of the gear 71 and the pulley 65,and it does not break the connection between the pinion 72 and the gear71 by virtue of which the semaphore arm is locked in the raised positionuntil such time as the circuit is broken through the magnet 41 incidentto the entrance of a train in a block 16, as heretofore described.

Attention is called to the fact that it is by virtue of the worm gearelement of the means for operating the signal arm that the latter islocked against falling when in the safe position, since, if the ordinaryspur gear mechanism were employed in connection with the shaft of themotor, the retard ing action of the gears would not be suflicient tosupport the signal arm in the raised or safe position, the said armbeing weighted to fall as heretofore explained. In this connection, itmay be stated that the retarding action of the ratchet collar 97 actsupon the shaft in one direction only, viz., during the rotation of theshaft in response to the falling movement of the arm. During theoperation of raising the signal arm, the said ratchet collar is free torotate with the shaft, the locking pawl 102 being arranged in connectionwit-h the teeth of the ratchet to permit this result. Attention isfurther called to the fact that in our improved mechanism the safe anddanger lights are not controlled in any way by the movement of thesemaphore arm, but are displayed and extinguished independently of thearm. This is an important feature by reason of the fact that, if themechanism for operating the semaphore armwere out of order, whereby thesaid arm would not properly perform its function, the safe and dangerlights would continue to be controlled in exactly the same way as if theoperating mechanism for the semaphore arm were properly performing itsfunction.

Having thus described our invention, what we claim is:

1. In railway signaling apparatus, the combination of an electricalcircuit, a blocked track, the rail members of a block being in thecircuit, a relay in the block circuit adapted to be deenergized by theshort circuiting of the current due to the presence of a train in theblock, a second circuit normally closed by the relay, electromagneticmeans located in the second circuit and normally energized, a signaldriving mechanism and means for actuating the same to cause the signalto assume the safe position, means for'locking the mechanism in positionto maintain the signal in the same position, the locking means beingarranged to be thrown to the locking position by the electromagneticmeans, and auxiliary locking means initially actuated by theelectromagnetic means for maintaining the locking means in the lockedposition in addition to the direct action of the electromagnetic means.

2. In railway signaling apparatus, the combination of a circuit, ablocked track, the rail members of the block being in the circuit, arelay in the block circuit, adapted to be deenergized by the shortcircuit of the current, due to the presence of a train in the block, asecond circuit normally closed by the relay, electromagnetic meanslocated in the second circuit and normally energized, a signal, meansfor actuating the signal to cause it to assume the same position,comprising a motor, a gear actuated by the motor, a second gear out ofmesh with the motor gear, an interposed gear constantly in mesh with themotor gear, a movable element upon which the interposed gear is mounted,an operative connection between the armature of the electromagneticmeans and the said element to cause the interposed gear to mesh with thesecond gear when the electromagnetic means is energized, and auxiliarymeans initially actuated by the electromagnetic means for maintainingthe meshing relation between the interposed gear and the second gear.

' 3. The combination with a signal, of means for actuating the same tocause it to assume the safe position, said means including a motor, agear actuated by the motor, a second gear out of mesh with the motorgear, a third gear interposed between the motor gear and the second gearand normally in mesh with the motor gear, a movable element upon whichthe third gear is mounted, said element normally having a tendency tomaintain the third gear out of mesh with the second gear,electromagnetic means connected in operative relation with the saidelement to actuate the same to throw the third gear into meshingrelation with the second gear, and auxiliary means initially actuated bythe electromagnetic means for maintaining the meshing relation betweenthe second and third gears in addition to the direct action of theelectromagnetic means, said auxiliary means including a pawl carried bythe said movable element, a pivoted bar arranged to be engaged by thepawl on one side of its pivot, and an arm actuated by theelectromagnetic means to cause it to engage the said bar on the oppositeside of its pivot, whereby the bar is locked to maintain the third gearin operative relation with the second gear during the operation ofmoving the signal to the safe position.

4:. The combination of a signal arm weighted to fall, means for raisingthe said signal to the safe position, including a motor, an operatingconnection between the motor 129 and the signal including a movableelement normally having a tendency to interrupt the operation,electromagnetic means for causing said movable element to take theoperative position, and means initially actuated by the electromagneticmeans for maintaining the movable element in the operative position inaddition to the direct action of the electromagnetic means.

5. The combination of a signal arm weighted to fall, means for raisingthe signal to the safe position, including a motor, a movable elementdirectly connected with the signal, a second movable element adapted tobe operated by the motor, an operative connection between the twomovable elements to allow the element operated by the motor an initialmovement before the element connected with the signal begins to move,and means for automatically returning the second movable element to itsnormal position after the signal has assumed the danger position.

6. The combination of a signal arm weighted to fall, and means forraising the signal to the safe position, including a motor, 1

a wheel adapted to be connected in operative relation with the motor, asecond whee-l connected with the signal, a connection between the twowheels to permit an initial movement of the first wheel before thesecond wheel begins to move, and means for automatically returning thefirst wheel to its normal position, after the signal has assumed thedanger posit-ion.

7. The combination of a signal arm weighted to fall, means for raisingthe signal to the safe position, including a motor, a wheel adapted tobe connected in operative relation with the motor, a second wheelconnected with the signal, a connection between the two wheels to permitinitial movement of the first wheel before the second wheel begins tomove, the first wheel being weighted to return it to its normal positionafter the signal has assumed the danger position.

8. The combination of a signal arm weighted to fall, means for raisingthe signal t0 the safe position, including an electric motor, a wheeladapted to be connected in operative relation with the motor, a secondwheel connected with the signal, both wheels being mounted to rotateupon the same axis, a connection between the two wheels to permitinitial movement of the first wheel before the second wheel begins tomove, the first wheel being weighted to return it to its normal positionafter the signal has been raised to the safe position, and meansactuated by the first wheel for break: ing the motor circuit after thesignal has assumed the danger position.

9. The combination of a signal arm weighted to fall, means for raisingthe sig nal to the safe position, including an electric motor, a wheeladapted to be connected in operative relation with the motor, a secondwheel connected with the signal, both wheels being mounted to rotateupon the same axis, a connection between the two wheels to permitinitial movement of the first wheel before the second wheel begins tomove, means actuated by the'first wheel for breaking the motor circuitafter the signal has been raised to the safe position, and means forrestoring the first wheel to its normal position with respect to thesecond wheel after the falling of the signal.

10. The combination of a signal arm, a motor, mechanism adapted tooperatively connect the motor and the signal including amovable elementnormally having a tendency to interrupt the operation, electromagneticmeans for causing the movable element to take the operative position,and means initially actuated by the electromagnetic means formaintaining the movable element in the operative position in addition tothe direct action of the electromagnetic means.

11. The combination of a signal arm,

means for moving the said arm to a predetermined position, including amotor, a movable element directly connected with the signal, a secondmovable element adapted to be connected with the motor, an operativeconinection between the two movable elements 3 to allow the elementconnected with the moltor an initial movement before the elementiconnected with the signal begins to move, and means for automaticallyreturning the fsecond movable element to its normal posiltion, after thesignal has been moved to the predetermined position. l 12. Thecombination of a signal arm, lmeans for moving the said arm to apredetermined position, including a motor, a ljwheel adapted to beconnected in operative f relation with the motor, a second wheelconnected withthe signal, and a connection beftween the two wheels topermit the initial movement of thefirst wheel before the sec- ;ond wheelbegins to move, said connection comprising a pin on one wheel entering a1 slot in the other wheel.

13. The combination of a signal arm, -means for moving the said arm to ap'rede termined position, including a motor, a wheel adapted to beconnected in operative relation with the motor, a second wheel connectedwith the signal, a connection between the two wheels to permit initialmovement of the first wheel before the second wheel begins to move, thefirst wheel being weighted to return it to its normal position after thesignal has been moved to the predetermined position, and means actuatedby the first wheel for breaking the motor circuit after the signal hasbeen moved to the predetermined position.

14. The combination with a signal, of means for actuating the same tocause it to assume a predetermined position, including a motor, a gearactuated by the motor, a second gear out of mesh with the motor, a thirdgear interposed between the motor gear and the second gear and normallyin mesh with the motor gear, a movable element upon which the third gearis mounted and normally having a tendency to maintain I the third gearout of mesh with the second gear, electromagnetic means connected inoperative relation with the said element to actuate the same to throwthe third gear into mesh with the second gear, and auxiliary meansinitially actuated by the electromagnetic means for maintaining themeshing relation between the second and third gears in addition to thedirect action of the electromagnetic means, substantially as described.

15. In combination, a signal arm, mechanism for raising said armincluding a removable gear electromagnetic means for 15 moving said gearinto operative position and retaining it there, auxiliary means for looking said gear in the last named position after it has been moved by theelectromagnetic means, and means whereby the movement of the signal armby said mechanism is postponed until after the auxiliary locking meansis set.

In testimony whereof, We affix signatures in presence of two witnesses.

WILLIAM J. COOK. SIMON DEUTSCH.

WVitnesses A. J. OBRIEN, C. E. BRADEN.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

